This retrofit technology is included on EPA's Verified Technologies List for Clean Diesel.
Highway, light, medium, and heavy heavy-duty EGR and non-EGR engines; not originally certified or equipped with DPF, originally manufactured from 1994-2010, listed in Table A
|Retrofit Fuel, Max Sulfur||
15 parts per million (ppm)
|Reduction in particulate matter (PM)1||
|Reduction in nitrogen oxide (NOx)1||
|Reduction in hydrocarbons (HC)1||
0% (for DOC equipped engines)
|Reduction in carbon monoxide (CO)1||75%|
1 Baseline assumes an unmodified engine running on fuel with 15 ppm sulfur or less.
This technology is approved for use on the engines and/or vehicles detailed in the enclosure provided all of the operating criteria are met as described below:
- As there may be variations from application to application, data logging and a review of actual vehicle operating conditions is required to ensure Purifilter Plus M compatibility. The installer must provide the fleet owners and/or operators with a copy of the pre- and post-installation checklists, as well as copies of the data logging results and recommended regeneration schedules. Fleet owners/operators are responsible for adhering to the recommended regeneration schedule. At a minimum, CDTi recommends that all fleets proactively regenerate the Purifilter Plus M every 4 to 6 weeks.
- The engine must be operated on ultra-low sulfur diesel fuel (ULSD) of 15 ppm or less.
- The engine must be in proper operating condition, well maintained, and not consume lubricating oil at a rate greater than that specified by the engine manufacturer.
- The vehicle may not be equipped with an oil burning system and lube oil or other oils may not be mixed with the fuel.
- CDTi installs the back-pressure monitor and logger unit and the remote driver display on all vehicles equipped with a Purifilter Plus M.
- Verification Letter - Amended (PDF)(2 pp, 68 K, May 23, 2014)
- Table A. Applicable Engine Families - Amended (PDF)(24 pp, 295 K, May 28, 2014)